Evidence is offered to suggest a neurological origin for Paul's ecstatic visions. Paul's physical state at the time of his conversion is discussed and related to these ecstatic experiences. It is postulated that both were manifestations of temporal lobe epilepsy. Neurological disease is recorded in the Bible. Examples are grand mal seizures (Luke 9:37-42), aphasia (Luke 1:21-23, 62-65) and concussion (Acts 20:9-12). A tentative diagnosis may be made in the case of subarachnoid haemorrhage (2 Kings 4:17-37), paraplegia (Mark 2:3-12), poliomyelitis (Luke 6:6-11), cerebral palsy (Acts 3:1-8) and hysterical paralysis (Acts 9:33-35). The terrifying aspects of the psychoses (Luke 8:26-39) and of epilepsy were interpreted as manifestations of demoniacal possession. Some of the above conditions are portrayed in stained glass windows on the first floor of the National Hospital, Queen Square, London. St Paul (Paul of Tarsus), in a letter to the Church in Corinth, describes an ecstatic personal experience in which he felt "caught up to paradise", and mentions other "visions". In relation to these he writes of a "thorn in the flesh", a metaphor for an unpleasant infirmity which periodically racked him. It is postulated that Paul was subject to episodes of temporal lobe epilepsy (TLE) or complex partial seizures, some of which progressed to generalised convulsions. Much has been written about the nature of Paul's illness,I-10 and many theories propounded. The evidence upon which a diagnosis can be made is meagre, yet the description of his ecstatic experience is perhaps the most important index. Material In his second letter to the church in Corinth about AD 5611 Paul wrote (The Moffatt Translation of the Bible